Centrifugal pump performance intelligent prediction method considering performance constraint

Abstract

The invention discloses a centrifugal pump performance intelligent prediction method considering performance constraint, which comprises the following steps: collecting geometric parameters of an impeller and a pumping chamber of a centrifugal pump with different specific speeds and true values of lift, efficiency and power under different flows, and respectively constructing a training set and a test set; constructing and training a multi-output regression model based on the constraint relationship of the performance parameters; inputting the geometric parameters and the flow of the impeller and the pumping chamber of the centrifugal pump in the test set into the trained multi-output regression model to obtain predicted values of the two performance parameters; according to the constraint relationship, calculating to obtain a predicted value of the other performance parameter; and taking the minimum value of the error between the predicted value and the true value of the performance parameter obtained by calculation as an objective function of a heuristic optimization algorithm to obtain a multi-output regression model with the optimal structure parameter, thereby obtaining the predicted value of the unknown performance parameter. The method can accurately and reasonably predict the three performances of the centrifugal pump under multiple working conditions.

Description

technical field [0001] The invention relates to the field of performance prediction of centrifugal pumps, in particular to an intelligent performance prediction method of centrifugal pumps considering performance constraints. Background technique [0002] As the core power equipment for fluid transportation, centrifugal pumps are widely used in all walks of life. According to the design parameters of centrifugal pumps, accurate prediction of pump performance indicators can shorten the development cycle and save development costs. Among them, the impeller and the pressure water chamber are the key hydraulic components of the centrifugal pump, which play an important role in the performance of the pump. The impeller can convert the input mechanical energy into the kinetic energy of the fluid we need, and the pressurized water chamber plays a transitional role in turning the kinetic energy of the fluid. Therefore, proper key design parameters of the impeller and pressurized w...

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Problems solved by technology

However, at present, only the rated working conditions of the centrifugal pump are predicted, and the performance curve actually required by the project cannot be given, and the relationship between the performance of the pump head, power, and efficiency is not considered, and the actual value is only calculated using the machine learning algorithm itself. Approximation and prediction lead to the separation of the relationship between the predicted performance parameters, and also affect the prediction accuracy

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